At least the guards did not know how he had gotten into this room.

The guards knew little of the outside world and had limited education.

If anything had happened here, the outside guards would not have known it.

Best not to trust anyone you didn't know; the guard knew that much about the world.

The guards know I hold the power of life and death.

I'll let the guards know you're trying to find out something to help us all from getting shot.

Whatever sent these guards will know, soon enough, that we've passed them.

The guards knew her, so they didn't think anything was wrong with it.

The situation had never come up before; the guards really didn't know what the hell to do.

The guard did not know what was taking place within.